Chapter 9, Problem 90P

ILW A certain radioactive (parent) nucleus transforms to a different (daughter) nucleus by emitting an electron and a neutrino. The parent nucleus was at rest at the origin of an xy coordinate system. The electron moves away from the origin with linear momentum (−1.2 × 10⁻²² kg·m/s) $\hat{i}$; the neutrino moves away from the origin with linear momentum (−6.4 × 10⁻²³ kg·m/s) $\hat{j}$. What are the (a) magnitude and (b) direction of the linear momentum of the daughter nucleus? (c) If the daughter nucleus has a mass of 5.8 × 10⁻²⁶ kg, what is its kinetic energy?